فهرست مطالب

  • Volume:1 Issue: 9, 2012
  • تاریخ انتشار: 1391/09/20
  • تعداد عناوین: 6
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  • E. Elbakush, A. M. Sharaf Page 495
    This paper presents an efficient low impact V2H Battery Charging scheme developed by the Second Author for EV-Electric Vehicles. The FACTS based low impact EV-battery charging scheme is stabilized using a hybrid FACTS based NP-SF Filter Compensator that ensures a fully stabilized Common-AC and DC Bus voltages, reduced inrush current conditions and efficient AC-DC energy exchanges. The Li-Ion Battery is charged efficiently and quickly from the single phase source using a dynamic error driven multi loop controller. The FACTS dynamic Filter Compensation Scheme is fully regulated using the Modified Dual- loop PID controller to control the Boost-Type DC Chopper and FACTS NP-SFC Filter Compensator. A Dual- Loop dynamic error driven controller is used to regulate the Dc common bus and limit inrush current/overloading conditions. The Boost DC Chopper is utilized to regulate the power transfer from the AC source to Lithium-Ion Cell batteries. The MATLAB/SIMULINK Digital Simulation Functional Models for the Lithium-Ion battery, Boost Chopper, interface NP-SFC Filter, and Dynamic Controller Loops are fully modeled using MATLAB/SIMULINK/Sim-power Software Environment.
    Keywords: V2H, Smart Grid, EV, Battery charging, Dual Regulation, Modified PID controller, NP, SFC, Boost Chopper
  • R.S. Brum, L. A.O. Rocha, J. Vaz, E. D. Santos, L.A. Isoldi Page 505
    The main purpose of the present study is the numerical investigation of the influence of installation depth over the thermal potential of a soil-air heat exchanger for a clay soil of southern of Brazil. The problem is based on the numerical solution of conservation equations of mass, momentum and energy for a three-dimensional simplified domain. The equations are solved with the finite volume method (FVM). The turbulent flow in the duct of the device is tackled with the Reynolds Stress Model (RSM). The transient temperature fields predicted by the simplified numerical model were compared with numerical and experimental results of literature. The highest difference between the present results and the experimental predictions was nearly 11%. The results for several profundities showed that the installation depth of the buried duct has a significantly influence over the thermal potential of soil-air heat exchanger. It was also observed the augmentation and reduction of the air temperature, for a duct buried at a depth of 3m, in comparison with the external environment temperature of nearly 17% (3°C) and 25% (8°C) for two typical days of winter and summer, respectively.
    Keywords: Alternative Energy, Thermal Comfort, Computational Modeling, Soil, Air Heat Exchangers
  • A. Nazari, H. Shayeghi, A. Safari Page 523
    this paper presents a new approach for tuning thyristor controlled series capacitor (TCSC) based damping controller in order to enhance the damping of power system low frequency oscillations. The design problem of damping controller is formulated as an optimization problem according to the eigenvalue-based objective function which is solved using biogeography based optimization (BBO). The effectiveness of the proposed controller is demonstrated through eigenvalue analysis and nonlinear time-domain simulation studies under a two ranges of loading conditions. The simulation study shows that the designed controller by BBO performs better than PSO in finding the solution.
    Keywords: TCSC, Optimization Problem, Biogeography Based Optimization, Damping Controller, Low Frequency Oscillations
  • Santosh Sonar, Tanmoy Maity Page 532
    Recently proposed ZSI (Impedance source inverter) has unique boost capability which is not there in traditional VSI or CSI. The paper addresses the major problem of instability in wind mill power generation connected to grid and a solution of short disturbances in generated power is proposed utilising the buck boost capability of ZSI. Different switching control techniques have been applied to the ZSI to feed low harmonic quality power to the grid. The most suitable technique is chosen and implemented to find out the performance of the system. The paper ends up with an overview of ride through capabilities under wind generator voltage dip and surge conditions through a suitable control of ZSI shoot-through duty cycle.
    Keywords: ZSI, Converter, Wind Power, PMSM
  • Mahmudul Hasan, Barun Kumar Das, Md. Abdul Kader, Md. Rokunuzzaman Page 537

    Wind energy is the most rated source of renewable energy in the present world. But it is not feasible to extract this form of energy everywhere due to the variation of wind speed. In Bangladesh, Rajshahi city, in particular reveals that the average wind speed is below the cut-in-wind speed. So, it is difficult to generate electricity. The main goal of this work is to perform a structural analysis of a light wind turbine blade so that it can rotate in lower wind speed. Light blades can move faster and increases the rpm. The mechanical efficiency of the wind turbine depends on rpm. The maximum mechanical efficiency of about 35% has been obtained from this work.

    Keywords: light blade, structural analysis, mechanical efficiency
  • Marjaneh Mahmoudzadeh, Abbas Rezaey Page 542
    A novel robot with capable of ice removing combined thermal and ultrasonic approaches for tether of high altitude wind power station (HAWPS) is proposed. All parts of the robot are described. The robot is modeled using multi body dynamic approaches. By performing practical experiments on a manufactured prototype in simulated line environment, the feasibility of the proposed concept is validated.
    Keywords: HAWPS, Inspection robot, Multi, body dynamic